package com.itheima.reggie.controller;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * 前端发送的是JSOn格式的数据，故用@requestbody
     * 此为异步请求，AJAX。不返回页面。
     */

    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        //md5 加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());


        //查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp=employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if(emp == null){
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if(!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0){
            return R.error("账号已禁用");
        }

        //6 登陆成功，将用户ID存入到Session中返回登录结果。
        /**
         * 现SSEION内含有的参数
         *          employee：用户ID
         */
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);

    }
    /**
     * 退出功能
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        request.getSession().removeAttribute("employee");
        return R.success("已经退出了");
    }

    /**
     * 新增员工
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
    log.info("新增员工");
    employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //公共字段，比如createuser由MyMetaObjecthandler方法来自动填充了。
        //获得当前登录用户的id
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setCreateUser(1l);
       //employee.setUpdateUser(1l);

    employeeService.save(employee);
    return R.success("新增员工");


    }

    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}" ,page,pageSize,name);
        Page pageInfo = new Page(page, pageSize);
        //构造分页构造器

        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        queryWrapper.orderByDesc(Employee::getCreateTime);

        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 修改员工信息，添加和修改公用一个控制器，一个页面
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){


        long id=Thread.currentThread().getId();


       // log.info(employee.toString());
       // Long empId = (Long)request.getSession().getAttribute("employee");
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(empId);
        employeeService.updateById(employee);


        return R.success("员工信息修改成功");
    }

    /**
     * 根据id，查询用户信息，将信息回显到add页面。此请求是add页面初始化时，create（）中调用的方法，发送的AJAX请求。
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> query(@PathVariable Long id){
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}

